fix: revoke points when a comment is deleted

- revokePoints now accepts optional recordingId; when absent it deletes
  one matching row (for actions like COMMENT_CREATE that have no recording)
- deleteComment queues revokePoints + checkAchievements so leaderboard
  and social achievements stay in sync

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/backend/src/graphql/resolvers/comments.ts

@@ -98,6 +98,18 @@ builder.mutationField("deleteComment", (t) =>
       if (!comment[0]) throw new GraphQLError("Comment not found");
       requireOwnerOrAdmin(ctx, comment[0].user_id);
       await ctx.db.delete(comments).where(eq(comments.id, args.id));
+
+      await gamificationQueue.add("revokePoints", {
+        job: "revokePoints",
+        userId: comment[0].user_id,
+        action: "COMMENT_CREATE",
+      });
+      await gamificationQueue.add("checkAchievements", {
+        job: "checkAchievements",
+        userId: comment[0].user_id,
+        category: "social",
+      });
+
       return true;
     },
   }),